What is a Buffer Overflow?

The term ‘Buffer Overflow’ refers to on occasion when a program tries to write more data to an individual section or memory block’s buffer than it is intended to contain. As buffers are designed to contain a specific amount of data, any surplus writes will be performed at adjacent memory locations. That is unless a program is configured to discard extra data when too much is transferred to the buffer.

In terms of internet security, this is an area of potential weakness often targeted by external hackers who can gain access and alter internal values or crash the process in question.

Lifetime Warranty

All OFFTEK memory is backed by our full lifetime warranty. We obsess over our products so you do not have to. Our team constantly strive to ensure that all our memory is of the highest quality but should you ever have any issues with your purchase you have the peace of mind that you can return your product for a replacement if the need arises.

Top Brands

We have close relationships with all of the top tier RAM memory manufacturers which enables us to provide a constant supply of the highest quality products. This in effect means compatible, reliable RAM and most importantly great prices, all backed by a limited lifetime warranty. If you require a specific brand of memory then please do not hesitate to contact one of our sales team.

Guaranteed Compatibility

Over the years we have taken immense care in creating one of the most in depth memory configurators. We do this to ensure that when you purchase a memory upgrade from OFFTEK you are confident that the upgrade is 100% compatible with your system.
Should you have any questions prior to ordering your upgrade we have technicians on hand via live chat, email or phone who will be able to answer any queries you may have.

We take the time to look into each machine to ensure that we offer all sizes and speeds that the machine is able to take not just the latest specification that has been released. We believe that offering all options for machines provides a 100% guarantee that the memory with function with your original memory module efficiently.

Explaining the different types of memory

Ram comes in all different types, not just the standard memory modules we take for granted in all Desktop and laptop machines. With that in mind, we now run through a few different types of RAM and what they are used for.

SDRAMWhilst all current RAM options are technically just a newer version of SDRAM, the term on its own denotes a variant of hardware that precedes the introduction of Double Data Rate (DDR) memory that came into being in around the year 2002.

DDRThe aforementioned memory hardware was superseded by Double Data Rate (DDR) SDRAM and has since had three more evolutions since then. The latest advancement is named DDR4 SDRAM, which offers the fastest clock speeds on the market. An important point to note is that different evolutions (e.g. DDR2, DDR3 etc) will not be compatible with each other. This is the one that we all use in our everyday PC's and Laptops and the one that we are able to upgrade in order to improve the performance. SRAMPrimarily used for the storing of cache data, this type of memory has no capacitors to speak of, but it does usually have between 4 and 6 transistors.

ROMRead Only Memory is non-volatile hardware that can only be read, as the name would suggest. It is typically used by the CPU to store important BIOS data and can usually not be written to, unless a firmware update is needed.

C-MOS RAMYour computer needs to remember small quantities of system information about various components inside like the settings for the hard disk. This particular variety of RAM even has its own mall battery to maintain the integrity of the data.

VRAMAllocated entirely to the assisting the GPU process graphics, VRAM is also known as Video RAM. It would be quite difficult to specifically purchase just VRAM, as it’s usually either integrated into a dedicated GPU or into the motherboard itself.

When buying new memory, it’s imperative that you check out the specifics of your motherboard and the Operating System it uses, as this will help guide you to your most appropriate selection.

Install in matched pairs to utilise Dual Channel mode. If 4GB is installed then the system may only recognise 3.5GB or less. A 64-bit Operating System is required to utilise more than 4GB of memory.

If you are looking to place a quantity order or are buying on behalf of the public or private sector then please contact one of our designated account managers who will be able to deal with your requirements in more detail.

Unsure on your current memory specification or looking to purchase in quantity?

For any queries you may have please contact one of our experienced Memory Specialists via one of the following methods and they will ensure that any issue is resolved immediately and effectively.

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Why buy from offtek

Matched Ram upgrades for your specific model

Offtek provides matched upgrades for new and legacy machines. Every one of our RAM modules are tested to ensure that not only are they compatible with the machine but also that they perform in a wide range of different environmental conditions. This allows us to back our modules with a limited lifetime warranty.

Established in 1996, OFFTEK is trusted by many of the UK's best known household names as their number ONE source for ram upgrades.

Misson critical or movie night we have your upgrade sorted

Our team is made up of memory specialists with an average of 9 years experience in the RAM industry. We offer upgrades for not only the latest machines on the market but just as important those legacy machines that you need to keep running.

RAM is extremely important in ensuring your machine operates at its optimum performance. Our upgrades ensure that your computer will be performing at its best for years to come.

Fast Free UK Delivery

We offer FAST FREE UK Delivery on all orders with 96% of orders dispatched same day. For those that cannot wait we also offer faster delivery options including next day.

60 Day Money Back Guarantee

Not 100% happy with your order then return it to us under our No Quibble 60 Day Money Back Guarantee. Worried you might have made the wrong choice? With our no quibble return policy you can send it back to us and get a full refund up to 60 days after you've received your order. Whether you've picked the wrong product or just changed your mind you can send your order back to us and you'll get all your money back.

Twice Daily Price Checks

Our Price Promise commitment means that you can buy from us with confidence.

Our team works hard to ensure that you not only have peace of mind in the fact that the memory you order is 100% compatible but that our price is also the lowest for that product.

We check our prices daily against all our competitors to ensure that you are getting the best deal.

Experts On Hand

We have dedicated and highly trained experts with an average of 7 years experience. They are here to help you from purchase through to installation. We use a number of contact methods so you can speak to one of our specialists with ease.

Limited Lifetime Warranty

Feel confident that your memory will last a lifetime. Our limited lifetime warranty guarantees that if your memory should ever fail we will replace or repair the product free of charge provided that it is still manufactured. Please note that the lifetime warranty refers only to memory modules and not flash memory or storage products. Please see the individual 'product details' for warranties specific to each product.

100% Compatibility

Every memory product matched specifically to your machine is individually tested to guarantee reliability and 100% compatibility with your computer and operating system.

Online Since 1997

Offtek has been supplying memory online since 1997 with over 500,000 happy customers. Well, maybe the odd one does'nt like us ;)

We have always been passionate about providing our customers with the tools and information to update their systems in the simplest manner. Early in 1996 we took on the challenge to find the type of memory compatible with every computer ever built. Hence our first memory configurator was born. Our constant daily updates allow our customers to easily select the correct memory for their machines and that objective is as important today as it was when the idea was first broached across a kitchen table in central Birmingham

Large Stock Holding

As one the largest memory distributors in Europe, our large stock holding allows us to offer next day delivery on a wide range of products.

Environmentally Friendly

If you have no need for your old memory after you have upgraded to one of our larger/faster modules, we will recycle this for you free of charge under the WEEE directive.

The advantages of adding more Ram Memory

Installing a memory module is one of the simplest upgrades that can be done to a computer

There is no configuration, no sitting around waiting for things to update and backup. It is simply plug and play!By adding more Ram memory into you laptop, desktop or server you will be doing the following:

Improving the overall performance of the machine

Allowing for increased multitasking

Extending the life of the machine

Producing faster boot times

Increasing productivity

Decreasing latency in gaming

Adding memory is the easiest upgrade available for your machine for the best increase in performance. If you are unsure on how to upgrade your machine no problem take a look at our detailed guides on how to install your new Laptop or Desktop Memory upgrade.

Compatibility Guarantee

Guaranteed Compatibility

Over the years we have taken immense care in creating one of the most in depth memory configurators. We do this to ensure that when you purchase a memory upgrade from OFFTEK you are confident that the upgrade is 100% compatible with your system.
Should you have any questions prior to ordering your upgrade we have technicians on hand via live chat, email or phone who will be able to answer any queries you may have.

We take the time to look into each machine to ensure that we offer all sizes and speeds that the machine is able to take not just the latest specification that has been released. We believe that offering all options for machines provides a 100% guarantee that the memory with function with your original memory module efficiently.

Delivery Options

UK Delivery

Free UK Delivery (within 5 working days) £0.00

1st Class Delivery (within 1-2 working days) £0.95

Next Day (Before 1PM) £5.95

Next Day (Before 9AM) £15.50

Saturday Guaranteed £10.50

DHL Courier and same day delivery options are available on request.
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International Delivery

We now deliver to over 200 countries worldwide with DHL at incredibly low prices.

"Great price, fast delivery, everything worked as planned - what more could you ask for?"

Verified Order

25th September 2012

"Great service thank you A+++++++++++++++++++"

Hugh from Stirling

26th August 2012

"i ordered the memory i was needing after using there easy guide to make sure it was right o ordered it 2 days later it was there there was also easy to follow instructions how to install it on there site will definatly use them again"

Michael from Essex

19th April 2012

"Good quality memory and best price I could find for what I was looking for. Postage was a little slow but overall had a good experience with Offtek."

Contact form for the Privacy Officer

You can contact the Offtek Privacy Officer at any point should you have any queries relating to our "Privacy Policy".

This form allows you execute your right to be forgotten. You have the right to object to our use of your personal data, or ask us to view, edit, remove or stop using it if there is no need for us to keep it.

In order to comply with your request, we may ask you to verify your identity.

If you request removal of your personal information, we may as detailed within our Privacy Policy be required to retain some of your data for a minimum period.

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